While the vehicle is running, the occupant is in a vibrating environment. The intensity of vibration, the resonant frequency and the time of vibration are the three major factors that harm the human body. When the vibration frequency is low, the vibration acceleration plays a major role. When the vibration frequency is high, the amplitude plays a major role. High-frequency vibration mainly affects the nerve endings of various tissues of the human body. For vibrations of the same intensity and frequency, vibrations that can be tolerated in a short period of time are likely to become intolerable over time.
The research data show that the visual interference is the biggest when the vibration frequency is 10~30HZ. When the vibration frequency is 50HZ and the acceleration is 2m/s2, the visual acuity is reduced by 50%. When vibration is transmitted to the human body, the stability of the hand or foot is deteriorated, and the accuracy of the operation is deteriorated. The amplitude is larger, and the impact is greater.
The wire rope dry friction damping assembly is applied to the vibration and impact protection of the tracked vehicle seat, which can attenuate the internal and external excitations to the utmost, thereby reducing the intensity of the vibration and suppressing the transmission rate at the time of resonance. Try to avoid excessive fatigue of the driver and gunner, and improve the occupant's anti-vibration time, which is of great significance for improving the combat performance of the armored vehicle and the contingent combat capability of the occupant.
The upper and lower layers of the clamping steel plate and the tightly wound stainless steel wire rope isolator
, that is, the vibration isolator that absorbs energy by the dry friction between the wires of the steel wire during vibration, is called the wire rope dry friction damping isolator, referred to as the wire rope isolator for vibration damping
. It can be isolated in three directions, is not afraid of high temperature and chemical pollution, and can use the hysteresis damping generated by the dry friction between the various strands to dissipate energy that is not available in conventional shock absorbers. Therefore, since the end of the 1970s, the United States, Norway and other countries have carried out more research, and have been applied in practice, such as the outer support ring of the space shuttle engine nozzle, the support of the submarine engine base and the electronic circuit board suspension and so on.
The wire rope vibration dampers is simpler in structure than other existing nonlinear dampers, and the production process is easy to implement. It is suitable for the structural design of the personnel seat under large shock vibration conditions and the vibration damping structure design of large mechanical equipment and instruments in a complicated environment.
Wire rope isolators damping
Rubber shock isolators